Galbraith gives you four men and clues that could fit any of them. One suspect made headlines for cutting off his enemy’s penis, another is a violent paedophile, one may have murdered Strike’s mother and the fourth, a Scottish ex-army man, is a perfect savage. Strike has not met any of them in years and isn’t quite sure whether he would recognise them if he met them again. Despite that, going by records and experience, both Strike and Robin have their favourites among the four. However, a serial killer with a knife and a refrigerator borrowed right from Idi Amin is bound to evoke the original sadistic killer—Jack the Ripper. Indeed, three quarters through the novel, the press starts calling him the Shaftesbury Ripper. Not that it helps the reader guess who he is, though the roses sent to Robin quite obviously do not come from Matthew.